Improvement in skelp-forming rolls



1.0. BETZ.

Skelp-Forming Rolls.

No. 166,359. I PatentedAug.-3,1875..

A Nj I I I gs MPEIERS, FHOI'ULITHOGRAPNER WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

JosEPH o. GETZ, OF PHILADELPHIA, PENNSYLVANIA, AssIeNoE OF oNE- HALE HIsRIGHT To AsA o. DENIo, OF WILMINGTON, DELAWARE.

IMPROVEMENT IN SKELP-FORMING ROLLS.

Specification forming part of Letters Patent No. 166,359, dated August3, 1875; application filed April 12,1875.

To all whom it may concern:

Be it known that 1, JOSEPH G. GETZ, of Philadelphia, Pen nsylvania, haveinvented certain Improvements in Skelp-Forming Rolls, of which thefollowing is a specification:

The object of my invention is to roll at one heat tubeskelps withwell-defined beveled edges by means of rolls grooved to present openingshaving the general conformation illustrated by Figures 2, 3, and 4 ofthe accompanying drawing, Fig. 1 being a view of the rolls.

A square bar is first passed between the rolls through the opening a,presented by the grooves 1 1, Fig. 1, which, without depriving the barof its quadrangular shape, reduces it in sirle, and makes it wideracross the corners in one direction than it is in the other. The bar isthen passed through the opening b, presented by the grooves 2 2, and isthereby furth er reduced by making it still narrower across the cornersin one direction than in the other. The third pass reduces the bar tothe shape of the opening 0, formed by the grooves 3 3, this being thefirst change of the bar from a quadrangular form, a section of the bar,after the third pass, presenting a figure bounded by two sides, each ofwhich is partly straight and partly rounded, the two sides meeting atopposite sharp edges. The fourth pass is made through the opening (1,formed by the portions 4 4 of the rolls, which present an opening of ashape allied to that of the opening 0, but such as to flatten therounded portions of the bar oiieach side of the same near each edge.

It should be understood that after the bar has passed through theopening cit should be turned before permitting it to pass through theopening d.

The next pass through the opening 0 reduces the bar to a rhomboidalsectional form, and this shape is maintained during'the furtherreduction of the bar by passing it through the openings f, g, and h, thelast pass reducing the bar to the desired form of the skelp. After thebar has passed through the openinge it should be turned before it ispassed through the openin g f, and again turned before passing through 9and h, this turning of the bar resulting in the formation ofwell-defined sharp edges, as will be readily understood by thosefamiliar with rolling operations.

Figs. 2, 3, and 4 indicate the changes in the form of the bar,intermediate changes being those of degree and not of generalconformation.

A good skelp bar must have perfectlyformed beveled edges, and it is ofespecial importance that the extreme sharp edges should be welldefined-a result which is brought about by never losing sight of theserequired edges from the first pass through a to the final pass throughh, for the opening a defines these extreme edges in the first instance,and the sharpness of these edges is maintained throughout.

The rolls may present but one opening, or more than two openings of thecharacter designated by the letters a and b, and the same with theopenings of the form 0 cl, and the group of openings of the form 6, f,g, and h may be increased in number, as the desired size of theskelp-bar and other circumstances may suggest.

I claim as my invention Skelp-rolls grooved as set forth, so as toreduce a bar first to the form Fig. 2, then to the form Fig. 3, and thento that represented by Fig. 4, as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' JOSEPH O. GETZ.

Witnesses:

HUBERT HowsoN, HARRY SMITH.

